This page describes the IBM SMS card "HBWW", and is part of the SMS card database.

Function of the card:
Cap Sense Amplifier
Capacitor Sense Amplifier (3 loads)

Listed in 1401 SMS card usage

Part number: 371500

Used in: IBM 1401, IBM 7070

Cap code: WW (details)


AM: Amplifier. Provides increased strength to a detected signal or pulse.

References: Coslet data
IBM Standard Modular System, Component Circuits, p143
2_2 SMS Cards, p153
1401 Pocket Reference Manual
This page created by Ken Shirriff on Wed Sep 15 18:15:11 2021.

The information on these pages comes from a variety of sources, especially old IBM documents on, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.